Paint-dissolver.



' 1a Drawing.

in s ns an ornron HAY GATLETT, @F LOS ANGELES', CALIFORNIA, ASSIGNQJR T SCHAILK CHEMICAL To all whom it may concern:

Be it known that I, HARRY CA'rmTT, a

citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Paint-Dissolver, of which the following is a specification.

This invention relates to compounds or mixtures for freeing or cleansing brushes,

floors and other objects of paint, varnishes and other oil-containing preparations.

An object of the invention is to produce amixture that canreadily be used for the purposes specified without injury to the surfaces or objects to which it is applied.

Another object is to produce a cleansing compound which will not cause swelling of the wooden handle of paint brushes so as to avoid the subsequent shrinkage thereof and consequent cracking of the cement around the bristles and'falling out of the bristles.

Other objects and advantages will be set forth hereinafter. I

The cleansing compound is formed by combining, or mixing together tri sodium phosphate (Na PO and sodium chlorid (NaOl). Proportions found to be sat1.S-'

factory in use are 93.25 percent of the trisodium phosphate and 6.75per cent. of thesodium chlorid, though other proportion may be used to advantage.

The mixture thus formed may be put up in bulk or packages for the trade and when ready to use the mixture is dissolved in water of a volume that varies in accordance with the strength of the-solution desired.

clean a brush of paint or varnish the .brush will be soaked in the solution until the paint or varnish in the brush is thoroughly loosened. The time required for this is generally from eight to thirty-six hours, de-

@F LOS ANGELES, CALIFORNIA, A CORPORATION OF CALJEFQRNEA.

. I T-DISSQTLVER.

Specification of jLetters Patent. Pattemiggqjl @(3'63, 1, 1291155 application filed A ril-24,1917. Serial in. 164,284, l

pending upon the condition of the brush.

The tri sodium phosphate dissolved in the water hydrolyzes, the equation reading The resulting sodium oxid or hydrate NaOll-T saponifies the triglycerid (the vegetable oil in the paint or varnish), forming a sodium salt of the fatty acid which of course is soluble in water, the equation reading 3 5( )s+ 51 1o5-( )a The sodium phosphate precipitates all of X' stands for calcium or magnesium in the above equations.

The sodium chlorid increases the density of the water of the solution so as to minimize the penetrating power ofthe solution, thus insuring against swelling of the wood of the handle of the brush and subsequent shrinkage of the wood and cracking of the cement around the bristles and falling out of the bristles.

After soaking the brush as described above, the brush is then washed in the usual way with Warm Water and soap.

The brush is allowedvto dry andthen is rinsed in benzin, turpentine or the like to straighten out the bristles.

To clean brushes having, shellac in them less water is used than above noted so that the solution will be stronger and the brushes are soaked longer than for cleansing them of paint or varnish.

It makes no difi'erence whether the brushes to be cleaned have been used in "paint,

varnish or shellac or how long they have stood before cleaning except that the harder the paint, varnish or shellac has become the longer the soaking of the.brushes is continued.

' The solution does not afi'ect the bristles ini juriously, but softens the paint so that it may be readily removed with soapand warm water.

To clean pine or hard wood floors finished with wax, shellac or varnish, desirable proportions are one pound of the mixture to five quarts of warm water to make -a soluv tion, whichis then applied, preferably while Warm, by a mop orcloth to the floor. The

solution is allowed to remain on the floor,

' color and maybe refinished, as desired,

Interior finish or woodwork may "be cleaned by using a solution of which the lngredients are in the proportion of one tahlespconful of the mixture to one gallon of water.

at sponge or soft cloth is moistened with the solution and rubbed on the surface to be cleaned which is then rubhedwith a dry cloth. The surface thus cleaned is then in perfect condition for refinishing.

, ll claim:

The paint dissolver described characterized in that it contains only tri sodium phosphate and sodium chlorid in substantially the, proportions of 93.25 per cent. and 6.75 per cent. respectively, and sufiicient Water to dissolve the tri sodium phosphate and sodium chlorid.

Signed at Los Angeles, California, this 35 18th day of April, 1917.

HARRY CATLETT. Witnesses:

. GEORGE H. HILES,

A. F. SCHMIDTBAUER. 

